Thermostat



March 9 1.926.

INVENTOR ATTORNEY Patented Mar. 9, 1926.

UNITED STATES PATENT OFFICE.

EUGENE ARSNE` DIFFIN'GER, 0F PARIS, FRANCE, ASSIGNOR T0 ETABLISSEMENTS i P. COLOMBIER, FILS, F PARIS, FRANCE. y

THERMOSTAT.

Original application led August 18, 1923, Serial No. 658,138. Divided and this application iiled May 2, 1924. serial No. 710,671.

To al1 whom z'tmay concern.'

Be it known that I, EUGENE ARsNE DIE- FINGER, a citizen of the French Republic,

1W adapted. for use in connection with refrig.

and residing atthe city of Paris, Republic of France, have invented certain new and useful Im rovements in Thermostats, of which the ollowing is a specification.

This invention relates to a thermostat, and particularly to a type of thermostat erating apparatus, the operation thereof being controlled by the temperature 'of the gas circulating between a rotary compressor and a condenser.

`This application is a division of my copending application Serial No. 658,138 iiled August'18t 1923, and covering a rotary compressore erated inroil to circulate a refrigerating uid in an evaporating apparatus while cooling brine is circulated around the same in a direction opposite to the travel of the refrigerating Huid, after which the compressed fluid is liquefied for further compression.

Among the advantages of this device are its autbmatic control, its precise accuracy secured through the differences of vpressure between a condensing device and an evaporating device, it being necessary in this type of refrigerating apparatus that the weight of the refrigeratin iuid entering the evaporatin device s all equal the weight of what 1s withdrawn from the eva-poratingl device by the compressor preparator to compression and delivery to the con ensing apparatus, thereby controlling the opening in a regulating cock.

In the preferred form shown herewith, my device is shown as it wouldbe constructed for attachment to such a rotary refrigerating apparatus but it can also be used in many other constructions where vtemperatures are available as operative slightly higher than the temperatureof the pressed gas and it also communicates by the V flexible tube 7 with the chamber 8 which contains mercuryy and may be connected with the said condenser through the conduit 9. l

The upper end of the cylinder 8 is secured in the base of the bell shaped chamber 10 containing a iioat 11 the interior of which is connected with the cylinder 8 by the spiral tube 12, the openlower end of which is positioned near the bottom of the cylinder 8.

Above the chamber 10, the conduit 13 having an orifice 14 for communication with the evaporating device of the refrigerating apparatus is arranged, and within the said conduit the piston 15 is held by the spiral spring 16 against the float 11, the spring 16 being adjustable bythe screw threaded ring 17. The screw cap 18 provided with packing, acts as a tight closure of the top yof the l devlce.

In the said piston 15 theA triangular groove 19connects the interior of the bell 10 with the conduit 13.

The operation is as-follows; variations in the temperature of the compressed gas affect the vapor in the cylinder 6 which by expansion will pass through the tube 7 into the cylinder 8 and cause a displacement through the spiral tube 12 of the mercury in the float 11, whereby the weiglit of the said float will vary and aii'ect the extent of the opening in the groove 19 by the piston 15. When the temperature of the gas in.

creases, the mercury in the cylinder 8 flows slowly into the float 11 which sinks by gravity and permits the downward movement of the piston 15 and the assage of an increased amount of the liquld in the chamber tion of the following elements; a container provided with a liquld adapted to be vaporized; a second container provided with mercury; a pipe connection between the said two containers; a chamber,- provided with an inlet and an outlet; a float within said chamber; a pipe connection between the mercury in the said second container and the said float; a conduit connected with the said chamber and provided With an outlet;

. and a piston mounted in the said conduit and having a groove in its' lower end, the said iston bein@r in engagement with the said oat and adapted to move therewith.

EUGENE ARSENE DIFFINGER. 

